package com.filters;

import java.io.IOException;

import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;

public class EncodingFilter implements Filter {

	@SuppressWarnings("unused")
	private FilterConfig config;
	private String encoding = "ISO8859_1";

	public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException {
		request.setCharacterEncoding(encoding);
		chain.doFilter(request, response);// 进行下一个过滤
	}

	public void init(FilterConfig config) throws ServletException {
		this.config = config;
		String s = config.getInitParameter("encoding");// 获取在web.xml中的参数
		if (s != null) {
			encoding = s;
		}
	}

	public void destroy() {
		config = null;
	}
}
